Among these plants, the ones which show physiological process referred to as "necessary evil" are
(a) Potamogeton
(b) Sagittaria
(c) Limnophila
(d) Nymphaea

b, c, d

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a, b, c

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a, b, d

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a, e, d

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Solution

The correct option is A b, c, d
Transpiration is considered as a necessary evil as excessive loss of water tends to hamper plant's metabolism. Some plants bearing these consequences are Sagittaria, Limnophila and Nymphaea.
So, the correct answer is 'b, c, d'.

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Similar questions

∣ ∣ ∣ ∣ ∣ ∣ \begin{matrix} a & b & c & d b & a & d & c c & d & a & b d & c & b & a \end{matrix} ∣ ∣ ∣ ∣ ∣ ∣ = (a + b + c + d) (a - b + c - d) (a - b - c + d) (a + b - c - d)

ω

x^{4} = 1

a + b ω + c ω^{2} + d ω^{3}

∣ ∣ ∣ ∣ ∣ ∣ \begin{matrix} a & b & c & d b & c & d & a c & d & a & b d & a & b & c \end{matrix} ∣ ∣ ∣ ∣ ∣ ∣

- (a + b + c + d) (a - b + c - d) {(a - c)^{2} + (b - d)^{2}}

A = ⎡ ⎢ ⎣ \begin{matrix} x & 1 & 1 1 & x & 1 1 & 1 & x \end{matrix} ⎤ ⎥ ⎦

B = [\begin{matrix} x & 1 1 & x \end{matrix}]

\frac{d A}{d x}

If (a + b +c + d) (a -b- c+ d)

=(a + b- c- d) (a -b+c- d);

prove that : a : b =c : d.

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